CN105336476B - Switching Power Supply, electromagnetic interface filter, common-mode inductor and its method for winding - Google Patents

Switching Power Supply, electromagnetic interface filter, common-mode inductor and its method for winding Download PDF

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Publication number
CN105336476B
CN105336476B CN201410242191.2A CN201410242191A CN105336476B CN 105336476 B CN105336476 B CN 105336476B CN 201410242191 A CN201410242191 A CN 201410242191A CN 105336476 B CN105336476 B CN 105336476B
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winding
common
mode inductor
retaining sheet
magnetic core
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CN105336476A (en
Inventor
程堂前
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In Reach Electronics (jiangsu) Co Ltd
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In Reach Electronics (jiangsu) Co Ltd
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Priority to CN201410242191.2A priority Critical patent/CN105336476B/en
Priority to TW103126102A priority patent/TWI550660B/en
Priority to US14/697,349 priority patent/US10090100B2/en
Publication of CN105336476A publication Critical patent/CN105336476A/en
Priority to US15/871,134 priority patent/US10157708B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/06—Fixed inductances of the signal type  with magnetic core with core substantially closed in itself, e.g. toroid
    • H01F17/062—Toroidal core with turns of coil around it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2895—Windings disposed upon ring cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F2003/106—Magnetic circuits using combinations of different magnetic materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H02M1/123—Suppression of common mode voltage or current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0092—Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/42—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
    • H03H7/425—Balance-balance networks
    • H03H7/427—Common-mode filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Filters And Equalizers (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)

Abstract

Present disclose provides a kind of Switching Power Supply, electromagnetic interface filter, common-mode inductor and its method for winding.The common-mode inductor includes a first coil winding and a second coil winding, and the method for winding of the common-mode inductor includes：Two separation retaining sheets are set in the diverse location of a magnetic core；First coil winding described in coiling is divided into two winding areas in the magnetic core, the first coil winding by one of separation retaining sheet；Second coil winding described in coiling is divided into two winding areas in the magnetic core, the second coil winding by another separation retaining sheet therein, wherein, the second coil winding and the symmetrical coiling of first coil winding.

Description

Switching Power Supply, electromagnetic interface filter, common-mode inductor and its method for winding
Technical field
This disclosure relates to Electromagnetic Interference Suppressing Techniques field, and in particular to a kind of method for winding of common-mode inductor, utilize The common-mode inductor of the method for winding preparation of the common-mode inductor, electromagnetic interface filter and switch electricity using the common-mode inductor Source.
Background technology
Switching Power Supply is a kind of time ratio by controlling switch pipe turn-on and turn-off, maintains the electricity of regulated output voltage Source.Switching Power Supply product develops towards the direction of miniaturization, high frequency at present, and this also causes Switching Power Supply product EMI (ElectroMagneticInterference electromagnetic interferences) noise is increasingly difficult to improve.Common-mode inductor is as switch Suppress one of main element of EMI noise in power supply, its own characteristic suppresses to have for EMI noise to be significantly affected.
As shown in fig. 1, it is the equivalent circuit diagram of common-mode inductor.As shown in Figure 2, it is a kind of common mode in the prior art The structural representation of inductor；The common-mode inductor mainly includes closed magnetic core 102 and the symmetrical coiling in the closed magnetic core Two coil windings 101.However, the common-mode inductor suppress EMI noise ability still have it is to be reinforced, hamper Switching Power Supply towards Miniaturization, the direction of high frequency are developed.
The content of the invention
The disclosure provides a kind of method for winding of common-mode inductor, for preferably being formed among coil windings between isolation Gap；Further, the disclosure additionally provides common-mode inductor, application prepared by a kind of method for winding using the common-mode inductor The electromagnetic interface filter and Switching Power Supply of the common-mode inductor.
Other characteristics and advantage of the disclosure will be apparent from by following detailed description, or partially by the disclosure Practice and acquistion.
According to the disclosure in a first aspect, a kind of method for winding of common-mode inductor, the common-mode inductor includes one the One coil windings and a second coil winding, methods described include：
Two separation retaining sheets are set in the diverse location of a magnetic core；
First coil winding described in coiling is in the magnetic core, and the first coil winding is by one of separation retaining sheet point It is divided into two winding areas；
Second coil winding described in coiling is in the magnetic core, and the second coil winding is by another separation retaining sheet therein It is divided into two winding areas, wherein, the second coil winding and the symmetrical coiling of first coil winding.
In a kind of embodiment of the disclosure, also include after symmetrical two coil windings of coiling on the magnetic core： Remove the separation retaining sheet.
In a kind of embodiment of the disclosure, the separation retaining sheet possesses magnetic or comprising ferrimagnet；It is described Magnetic attraction be present between separation retaining sheet and the magnetic core.
In a kind of embodiment of the disclosure, the separation retaining sheet is nonmagnetic substance, separation retaining sheet engaging or It is bonded to the magnetic core.
In a kind of embodiment of the disclosure, the separation retaining sheet is in " Qian " shape or " L " shape.
In a kind of embodiment of the disclosure, the separation retaining sheet is for integral type structure or by several flake structures Stack composition.
In a kind of embodiment of the disclosure, the thickness of the separation retaining sheet is according to the big of the external series gap to be formed It is small and set.
In a kind of embodiment of the disclosure, the thickness of the separation retaining sheet is 0.5mm-5mm.
In a kind of embodiment of the disclosure, the magnetic core is a closed annular magnetic core or closed polygon magnetic core.
According to the second aspect of the disclosure, prepared by a kind of method for winding of common-mode inductor using disclosure first aspect Common-mode inductor.
According to the third aspect of the disclosure, a kind of electromagnetic interface filter, including resistance series/parallel, inductor and capacitor combination into Electromagnetism interference filter circuit；The inductor includes the common-mode inductor of disclosure second aspect.
According to the fourth aspect of the disclosure, a kind of Switching Power Supply, include the common-mode inductor of disclosure second aspect.
In the method for winding for the common-mode inductor that embodiment of the disclosure is provided, mainly by advance at two of magnetic core Diverse location sets a separation retaining sheet respectively, in winding process, forms isolation in each coil windings using the separation retaining sheet Gap, each coil windings are divided into two winding areas.
On the one hand, in winding process, separation retaining sheet can maintain the shape of external series gap, external series gap is not occurred Deformation, and the size of external series gap can be by selecting the thickness of separation retaining sheet and by stability contorting；This not only increases altogether The EMI noise rejection ability of mould inductor, and product performance is stable.On the other hand, under the guiding auxiliary of separation retaining sheet, around Line operation is more convenient, is advantageous to improving production efficiency；And the separation retaining sheet can be reused, common-mode inductor can be reduced Production cost.
Further, since the common-mode inductor prepared using the method for winding of above-mentioned common-mode inductor is possessed stronger EMI and made an uproar Sound rejection ability, therefore more preferable EMI rejection abilities can be provided for Switching Power Supply or electromagnetic interface filter, so as to reduce Dependence to other EMI straining elements, make the structure design of Switching Power Supply or electromagnetic interface filter more succinct, save space and account for With and production cost.
Brief description of the drawings
Its example embodiment is described in detail by referring to accompanying drawing, the above and other feature and advantage of the disclosure will become It is more obvious.
Fig. 1 is the equivalent circuit diagram of common-mode inductor；
Fig. 2 is a kind of structural representation of common-mode inductor in the prior art；
Fig. 3 is a kind of structural representation of the common-mode inductor to be realized in the disclosure；
Fig. 4 is a kind of schematic flow sheet of the method for winding of common-mode inductor in disclosure example embodiment；
Fig. 5 is a kind of structural representation of separation retaining sheet in disclosure example embodiment；
Fig. 6 is the structural representation after separation retaining sheet is combined with closed magnetic core in Fig. 5；
Fig. 7 is structural representation of the closed magnetic core after coiling in Fig. 6；
Fig. 8 is a kind of structural representation for the common-mode inductor for utilizing the method for winding of common-mode inductor in the disclosure to prepare Figure.
Description of reference numerals：
101：Coil windings
1011：First winding area
1012：Second winding area
101A：First coil winding
101B：Second coil winding
102：Closed magnetic core
103：External series gap
104：Separation retaining sheet
H：Separation retaining sheet thickness
W：Separation retaining sheet A/F
S101-S103：Step
Embodiment
Example embodiment is described more fully with referring now to accompanying drawing.However, example embodiment can be with a variety of shapes Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, these embodiments are provided so that the disclosure will Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.In figure, in order to clear It is clear, exaggerate the thickness of region and layer.Identical reference represents same or similar structure in figure, thus will omit it Detailed description.
In addition, described feature, structure or characteristic can be incorporated in one or more implementations in any suitable manner In example.In the following description, there is provided many details fully understand so as to provide to embodiment of the disclosure.However, It will be appreciated by persons skilled in the art that the technical scheme of the disclosure can be put into practice without one in the specific detail or more It is more, or other methods, constituent element, material etc. can be used.In other cases, be not shown in detail or describe known features, Material is operated to avoid each side of the fuzzy disclosure.
In order to improve the EMI noise rejection ability of common-mode inductor, an embodiment is formed in each coil windings One external series gap, i.e., a coil windings are separated into two winding areas.It is i.e. final to need to realize as shown in Figure 3 altogether Mould inductor structure, wherein each coil windings 101 include the first winding area 1011 being separated by an external series gap 103 With the second winding area 1012.
In order to realize the common-mode inductor structure shown in Fig. 3, its can only be after the first winding area of coiling 1011, With the experience of staff, an external series gap is reserved, then the second winding area of coiling 1012.
However, because in winding process, under line can collapse, therefore this reserved external series gap can be with winding process Carry out and constantly deform, until finally vanish from sight, so then can only increase operating procedure on foot and to the EMI of raising common-mode inductor Noise inhibiting ability does not have benifit.Or after the completion of coiling, under this reserved external series gap has still been retained Come, but the external series gap size also is difficult to that (initial size is also by virtue of experience reserved, can not accurately be set with initial size It is fixed) unanimously, i.e., the size of the external series gap can not be controlled, and so can then cause the unstable of product performance
In this example embodiment, a kind of method for winding of common-mode inductor provide firstly.As shown in Fig. 4-Fig. 8, The method for winding of the common-mode inductor mainly includes：
Step S101. sets two separation retaining sheets in the diverse location of a magnetic core.Below with this in this example embodiment Magnetic core is illustrated exemplified by closed magnetic core；But it can also be non-closed magnetic core, the disclosure is not limited thereto.
First coil winding 101A described in step S102. coilings is in the magnetic core 102, the first coil winding 101A quilts One of separation retaining sheet is divided into two winding areas；Second coil winding 101B described in coiling is in the magnetic core 102, institute State second coil winding 101B and two winding areas are divided into by another separation retaining sheet therein, wherein, second coil Winding 101B and the symmetrical coilings of the first coil winding 101A；It should be noted that for first coil winding in the disclosure 101A and second coil winding 101B coiling order are simultaneously not particularly limited.
In addition to this it is possible to including：
Step S103. removes the separation retaining sheet.Pay attention to, the separation retaining sheet can not also be removed, depending on actual conditions It is fixed.
Above steps is described in detail with reference to Fig. 5-Fig. 8.
Fig. 5 is the structural representation of separation retaining sheet in this example embodiment.As shown in Figure 5, separation retaining sheet 104 is in " Qian " shape or other similar shapes, such as " u "-shaped, " C " shape or swallow-tail form etc..Separation retaining sheet A/F W is with closing The thickness of conjunction magnetic core is essentially identical, and such separation retaining sheet 104 can be fastened on closed magnetic core.As shown in Figure 6, it is described Separation retaining sheet 104 engage with the closed magnetic core 102 after structural representation.Although it is pointed out that closed magnetic core in figure 102 be a closed annular magnetic core, but the disclosure is not limited thereto, its can also be closed polygon magnetic core (such as rectangle) or Other variously-shaped closed magnetic cores 102 of person.
The material of separation retaining sheet 104 can be the nonmagnetic substances such as organic material or alloy material, and it can pass through card Close or bonding mode is connected to the closed magnetic core 102.Furthermore, it is contemplated that closed magnetic core 102 is magnetic material, so described Separation retaining sheet 104 can also be formed by magnetic material, i.e., described separation retaining sheet 104 possesses magnetic, certainly, the separation retaining sheet 104 can also be prepared by ferrimagnet.Therefore, there can be magnetic between the separation retaining sheet 104 and the closed magnetic core 102 Gravitation, so as to which the separation retaining sheet 104 is fixed in closed magnetic core 102 using the magnetic attraction.So, it is described The shape of separation retaining sheet 104 can then be not limited to above-mentioned " Qian " shape, and it can also be " L " shape etc..For example, kept off in isolation When piece thickness H is larger, due to larger with the contact area of closed magnetic core 102, stress is more abundant, therefore, can select L-shaped； When separation retaining sheet thickness H is smaller, then U-shaped can be selected, comes together to fix separation retaining sheet beneficial to clamping force and magnetic attraction 104。
The separation retaining sheet thickness H needs the size according to the external series gap to be formed and set, for example, can set The width of external series gap is 0.5mm~5mm.For example the width for the external series gap to be formed is 1mm, then separation retaining sheet thickness H Need to be set as 1mm；The width for the external series gap to be formed is 2mm, then separation retaining sheet thickness H needs to be set as 2mm etc..
Separation retaining sheet 104 can be integral type structure, and its thickness determines in shaping；Or institute is adjusted for convenience The thickness of separation retaining sheet 104 is stated, the separation retaining sheet 104 can also be stacked by several flake structures and formed.For example, each institute The thickness for stating flake structure is 0.5mm, then when needing 2mm separation retaining sheets 104, it is only necessary to selects 4 such flake structure heaps Stack.It is that connected mode can be bonding or magnetic connection between these flake structures, does not make spy herein It is different to limit.
After separation retaining sheet 104 to be arranged on to the predeterminated position of closed magnetic core 102, you can the two of closed magnetic core 102 On individual semi-ring, one coil windings of coiling, and the line footpath of the two coil windings and coiling number of turn all same respectively.Such as Fig. 7 Shown in, it is the structural representation after coiling.As can be seen that in winding process, separation retaining sheet 104 can be maintained between isolation The shape of gap, external series gap is set not deform upon, and the size of external series gap can be by selecting the thickness of separation retaining sheet 104 And by stability contorting.In addition, under the guiding auxiliary of separation retaining sheet 104, winding operation is more convenient, is advantageous to lifting production effect Rate.
As shown in Figure 8, after the completion of coiling, then can remove the separation retaining sheet 104, finally leave dimensionally stable and Size is the external series gap 103 of default size, this not only increases the EMI noise rejection ability of common-mode inductor, and The product performance arrived is stable.Certainly, after the completion of coiling, the separation retaining sheet 104 can not also take from closed magnetic core 102 Under, so as to during the use of the common-mode inductor, be further ensured that the external series gap 103 to be formed will not deform upon, Increase the reliability of properties of product.
In this example embodiment, a kind of being total to for method for winding preparation using above-mentioned common-mode inductor is additionally provided Mould inductor.According to the description of the method for winding for above-mentioned common-mode inductor, it is known that the common-mode inductor is each Formed with an external series gap in coil windings, and the shape of the external series gap and size with it is default in the same size.Cause This, by the common-mode inductor, can improve the EMI noise rejection ability of common-mode inductor, and product performance is stable.
In this example embodiment, a kind of electromagnetic interface filter is additionally provided.The electromagnetic interface filter include inductor, electric capacity and Resistance series/parallel combination into electromagnetism interference filter circuit；The inductor includes above-mentioned common-mode inductor.Due to above-mentioned Common-mode inductor possess stronger EMI noise rejection ability, therefore more preferable EMI can be provided for electromagnetic interface filter and suppress energy Power, so as to reduce to other EMI straining elements dependence (such as can reduce it is integrated after filter circuit electric capacity quantity With reduction capacitance), make the structure design of electromagnetic interface filter more succinct, save space hold and production cost, be advantageous to Electromagnetic interface filter develops towards the direction of miniaturization, high frequency.
In this example embodiment, a kind of Switching Power Supply is additionally provided.The Switching Power Supply can pass through control to be any Switching tube turn-on and turn-off realize power supply, such as can be UPS (Uninterruptible Power System, uninterruptedly Power supply), communication power supply, welding machine electric power etc..One of maximum difference of itself and prior art is to include above-mentioned common mode inductance Device.Because above-mentioned common-mode inductor possesses stronger EMI noise rejection ability, therefore can be provided for Switching Power Supply preferably EMI rejection abilities, so as to reduce to other EMI straining elements dependence (such as can reduce it is integrated after Switching Power Supply Electric capacity quantity and reduce capacitance), make the structure design of Switching Power Supply more succinct, save space hold and be produced into This, the direction for being advantageous to Switching Power Supply towards miniaturization, high frequency is developed.
The disclosure is described by above-mentioned related embodiment, but above-described embodiment is only the example for implementing the disclosure. It must be noted that the embodiment disclosed is not limiting as the scope of the present disclosure.On the contrary, do not depart from the disclosure spirit and In the range of the change and retouching made, belong to the scope of patent protection of the disclosure.

Claims (11)

1. a kind of method for winding of common-mode inductor, the common-mode inductor include a first coil winding and one second coil around Group, it is characterised in that methods described includes：
Two separation retaining sheets are set in the diverse location of a magnetic core；
First coil winding described in coiling in the magnetic core, the first coil winding by one of those it is repeatable utilize every It is divided into two winding areas from catch；
Second coil winding described in coiling is separated in the magnetic core, the second coil winding by another separation retaining sheet therein For two winding areas, wherein, the second coil winding and the symmetrical coiling of first coil winding；
Also include after symmetrical two coil windings of coiling on the magnetic core：
Remove the separation retaining sheet.
2. the method for winding of common-mode inductor according to claim 1, it is characterised in that the separation retaining sheet possesses magnetic Or include ferrimagnet；Magnetic attraction be present between the separation retaining sheet and the magnetic core.
3. the method for winding of common-mode inductor according to claim 1, it is characterised in that the separation retaining sheet is non magnetic Material, the separation retaining sheet engage or are bonded to the magnetic core.
4. the method for winding of common-mode inductor according to claim 1, it is characterised in that the separation retaining sheet is in " Qian " shape It is or L-shaped.
5. the method for winding of common-mode inductor according to claim 1, it is characterised in that the separation retaining sheet is integral type Structure is made up of several flake structures stacking.
6. the method for winding of common-mode inductor according to claim 1, it is characterised in that the thickness of the separation retaining sheet according to Set according to the size for the external series gap to be formed.
7. the method for winding of common-mode inductor according to claim 6, it is characterised in that the thickness of the separation retaining sheet is 0.5mm-5mm。
8. the method for winding of common-mode inductor according to claim 1, it is characterised in that the magnetic core is a closed annular Magnetic core or closed polygon magnetic core.
9. common mode inductance prepared by a kind of method for winding of common-mode inductor using according to claim 1-8 any one Device.
10. a kind of electromagnetic interface filter, including resistance series/parallel, inductor and capacitor combination into electromagnetism interference filter circuit； Characterized in that, the inductor includes common-mode inductor according to claim 9.
11. a kind of Switching Power Supply, it is characterised in that including common-mode inductor according to claim 9.
CN201410242191.2A 2014-06-03 2014-06-03 Switching Power Supply, electromagnetic interface filter, common-mode inductor and its method for winding Active CN105336476B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201410242191.2A CN105336476B (en) 2014-06-03 2014-06-03 Switching Power Supply, electromagnetic interface filter, common-mode inductor and its method for winding
TW103126102A TWI550660B (en) 2014-06-03 2014-07-30 Switching power supply, emi filter, common mode inductor and winding method thereof
US14/697,349 US10090100B2 (en) 2014-06-03 2015-04-27 Switching power supply, EMI filter, common mode inductor and wrapping method for the common mode inductor
US15/871,134 US10157708B2 (en) 2014-06-03 2018-01-15 Wrapping method for common mode inductor

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Application Number Priority Date Filing Date Title
CN201410242191.2A CN105336476B (en) 2014-06-03 2014-06-03 Switching Power Supply, electromagnetic interface filter, common-mode inductor and its method for winding

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CN105336476A CN105336476A (en) 2016-02-17
CN105336476B true CN105336476B (en) 2018-01-30

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US10090100B2 (en) 2018-10-02
US10157708B2 (en) 2018-12-18

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